Solo lunch set with tonkatsu near Ttukseom Station: Kosi Seongsu
Kosi Seongsu Branch is a Japanese udon and tonkatsu restaurant in Seongsu, Seoul, a 5-minute walk from Ttukseom Station Exit 6. Ordering the bukkake udon set with a ₩5,000 tonkatsu add-on on a weekend afternoon, the noodles were chewy and the sauce wasn't too salty, making it taste even better than the writer's earlier visit to the Gyodae branch. With both solo tables and group seating, it's a solid pick for a solo weekday lunch if you work in Seongsu.